Fiber optic

ALI HASSAN KHAN GURMANI

ROLL NO. 14-29

FIBER OPTICS

ALI HASSAN KHAN GURMANI

ROLL NO. 14-29

History of Fiber Optics

HISTORY OF FIBER OPTICS

During 1930, other ideas were developed with this fiber optic such as transmitting images through a fiber.

During the 1960’s, Lasers were introduced as efficient light source.

In 1970, All glass fibers experienced excessive loss of the light signal.

APPLICATIONS OF FIBER OPTICS

APPLICATIONS OF FIBER OPTICS

APPLICATIONS OF FIBER OPTICS

FIBER OPTICS

Total internal Reflection

Source and transmitters

A basic fiber optic communications system consists of three basic elements: Fiber media Light sources Light detector

There are three types of fiber optic cable commonly used

Single Mode

Step-index Multimode fiber

Plastic optic fiber

Fiber media

Optical fibers are the actual media that guides the light

A Light Sources

LED (Light emitting diode) ILD (injection laser diode)

Detectors•Detector is the receiving end of a fiber optic link.

There are two kinds of Detectors1. PIN (Positive Intrinsic Negative)2. APD (Avalanche photo diodes)

PIN

APD

ADVANTAGES OF FIBER OPTICS OVER COPPER WIRE CABLE

ThinnerHigher carrying capacityLess signal degradationLight signal FlexibleNon-flammableLightweight

DISADVANTAGES OF FIBER OPTICS OVER COPPER METAL CABLE

Optical fiber is more expensive per meter than copper

Optical fiber can not be join together as easily as copper cable. It requires training and expensive splicing and measurement equipment.

References

http://electronics.howstuffworks.com/fiber-optic7.htm

http://www.commspecial.com/fiberguide.htmhttp://www.thefoa.org/http://www.fiber-optics.info/fiber-history.htm

Idea of Modulation

When sending information by an optical fiber, the information must be encoded or transformed somehow into information that capable of being transmitted through a fiber. The signal needs to be modulated. There are two types of modulation Analog and digital.

History of Fiber optics

During 1930, other ideas were developed with this fiber optic such as transmitting images through a fiber.

During the 1960s, Lasers were introduced as efficient light sources In 1970s All glass fibers experienced excessive optical loss, the loss

of the light signal as it traveled the fiber limiting transmission distance.

This motivated the scientists to develop glass fibers that include a separating glass coating. The innermost region was used to transmit the light, while the glass coating prevented the light from leaking out of the core by reflecting the light within the boundaries of the core.

Today, you can find fiber optics used in variety of applications such as medical environment to the broadcasting industry. It is used to transmit voice, television, images and data signals through small flexible threads of glass or plastic.

Several applications of fiber optic

Configuration of a Fiber Optic Sensor System

Disadvantage of fiber optic over copper wire cable

Optical fiber is more expensive per meter than copper

Optical fiber can not be join together as easily as copper cable. It requires training and expensive splicing and measurement equipment.

Solar Board

Optical fiber transmits light. But, what prevents the light from escaping from the fiber?

The loss of fiber optic

Material obsorptionMaterial ScatteringWaveguide scatteringFiber bending Fiber coupling loss